/5 Science Quiz (for 12 to 16 years old): Quiz 20 1 / 5Which metal pollute the air of a big city? Copper Chromium Cadmium Lead 2 / 5Which of the following is the lightest metal? Silver Lead Mercury Lithium 3 / 5LPG consists of mainly methane, hexane and nonane methane, ethane and hexane ethane, hexane and nonane methane, butane and propane 4 / 5Which of the following is an element? Ruby Diamond Sapphire Emerald 5 / 5In fireworks, the green flame is produced because of potassium barium sodium mercury Your score is 0% Restart quiz Next quiz Please rate the quiz Send feedback By WordPress Quiz plugin
